heritage_is_shown_trigger

The comment above it in the file

Language trigger - Makes heritages available when you diverge your culture

What it checks

• the game's own tooltip text · ◦ our reading of the script line · code the script where neither exists

“They” is whatever it runs on (the scope it is called in). The scripted triggers and effects it calls link to their own pages; $PARAMETERS$ stay as written: each call fills them in.

heritage_is_shown_trigger = {
	scope:character = {
		OR = {
			AND = {
				exists = var:legendary_culture
				var:legendary_culture = { has_cultural_pillar = $HERITAGE$ }
			}
			culture = { has_cultural_pillar = $HERITAGE$ }
		}
	}
}